diff --git a/.htaccess b/.htaccess
index d6a43797..3050e2e7 100644
--- a/.htaccess
+++ b/.htaccess
@@ -17,8 +17,8 @@
 	# rather than link to images/ha/hash and have an ugly filename,
 	# we link to images/hash/tags.ext; mod_rewrite splits things so
 	# that shimmie sees hash and the user sees tags.ext
-	RewriteRule ^_images/([0-9a-f]{2})([0-9a-f]{30}).*$  images/$1/$1$2 [L]
-	RewriteRule ^_thumbs/([0-9a-f]{2})([0-9a-f]{30}).*$  thumbs/$1/$1$2 [L]
+	RewriteRule ^_images/([0-9a-f]{2})([0-9a-f]{30}).*$  data/images/$1/$1$2 [L]
+	RewriteRule ^_thumbs/([0-9a-f]{2})([0-9a-f]{30}).*$  data/thumbs/$1/$1$2 [L]
 
 	# any requests for files which don't physically exist should be handled by index.php
 	RewriteCond %{REQUEST_FILENAME} !-f
diff --git a/.travis.yml b/.travis.yml
index db087aa9..4d7dea99 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,6 @@
 language: php
 php:
-  - 7.1
-  - 7.2
+  - 7.0
 
 sudo: false
 
diff --git a/README.markdown b/README.markdown
index 4b60f8ad..e8271f0f 100644
--- a/README.markdown
+++ b/README.markdown
@@ -29,7 +29,7 @@ check out one of the versioned branches.
 # Requirements
 
 - MySQL/MariaDB 5.1+ (with experimental support for PostgreSQL 9+ and SQLite 3)
-- [Stable PHP](https://en.wikipedia.org/wiki/PHP#Release_history) (7.1+ as of writing)
+- [Stable PHP](https://en.wikipedia.org/wiki/PHP#Release_history) (7.0+ as of writing)
 - GD or ImageMagick
 
 # Installation
@@ -50,6 +50,24 @@ check out one of the versioned branches.
 4. Run `composer install` in the shimmie folder.
 5. Follow instructions noted in "Installation" starting from step 3.
 
+# Docker
+
+Useful for testing in a known-good environment, this command will build a simple debian image and run all the unit tests inside it:
+
+```
+docker build -t shimmie .
+```
+
+Once you have an image which has passed all tests, you can then run it to get a live system:
+
+```
+docker run -p 0.0.0.0:8123:8000 shimmie
+```
+
+Then you can visit your server on port 8123 to see the site.
+
+Note that the docker image is entirely self-contained and has no persistence (assuming you use the sqlite database); each `docker run` will give a clean un-installed image.
+
 ### Upgrade from earlier versions
 
 I very much recommend going via each major release in turn (eg, 2.0.6
diff --git a/composer.json b/composer.json
index 509164c6..5b91691f 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
 	],
 
 	"require" : {
-		"php" : ">=7.1",
+		"php" : ">=7.0",
 		"ext-pdo": "*",
 
 		"flexihash/flexihash"       : "^2.0.0",
diff --git a/core/_install.php b/core/_install.php
index d8971fc0..2b0a4eb3 100644
--- a/core/_install.php
+++ b/core/_install.php
@@ -108,8 +108,9 @@ function do_install() { // {{{
 	if(file_exists("data/config/auto_install.conf.php")) {
 		require_once "data/config/auto_install.conf.php";
 	}
-	else if(@$_POST["database_type"] == "sqlite" && isset($_POST["database_name"])) {
-		define('DATABASE_DSN', "sqlite:{$_POST["database_name"]}");
+	else if(@$_POST["database_type"] == "sqlite") {
+		$id = bin2hex(random_bytes(5));
+		define('DATABASE_DSN', "sqlite:data/shimmie.{$id}.sqlite");
 	}
 	else if(isset($_POST['database_type']) && isset($_POST['database_host']) && isset($_POST['database_user']) && isset($_POST['database_name'])) {
 		define('DATABASE_DSN', "{$_POST['database_type']}:user={$_POST['database_user']};password={$_POST['database_password']};host={$_POST['database_host']};dbname={$_POST['database_name']}");
@@ -153,7 +154,6 @@ function ask_questions() { // {{{
 	if(
 		!in_array("mysql", $drivers) &&
 		!in_array("pgsql", $drivers) &&
-
 		!in_array("sqlite", $drivers)
 	) {
 		$errors[] = "
@@ -201,7 +201,7 @@ function ask_questions() { // {{{
 								<th>Password:</th>
 								<td><input type="password" name="database_password" size="40"></td>
 							</tr>
-							<tr class="dbconf mysql pgsql sqlite">
+							<tr class="dbconf mysql pgsql">
 								<th>DB&nbsp;Name:</th>
 								<td><input type="text" name="database_name" size="40" value="shimmie"></td>
 							</tr>
@@ -360,29 +360,22 @@ function insert_defaults() { // {{{
 function build_dirs() { // {{{
 	// *try* and make default dirs. Ignore any errors --
 	// if something is amiss, we'll tell the user later
-	if(!file_exists("images")) @mkdir("images");
-	if(!file_exists("thumbs")) @mkdir("thumbs");
-	if(!file_exists("data")  ) @mkdir("data");
-	if(!is_writable("images")) @chmod("images", 0755);
-	if(!is_writable("thumbs")) @chmod("thumbs", 0755);
-	if(!is_writable("data")  ) @chmod("data", 0755);
+	if(!file_exists("data")) @mkdir("data");
+	if(!is_writable("data")) @chmod("data", 0755);
 
 	// Clear file status cache before checking again.
 	clearstatcache();
 
-	if(
-		!file_exists("images") || !file_exists("thumbs") || !file_exists("data") ||
-		!is_writable("images") || !is_writable("thumbs") || !is_writable("data")
-	) {
+	if(!file_exists("data") || !is_writable("data")) {
 		print "
 		<div id='installer'>
 			<h1>Shimmie Installer</h1>
 			<h3>Directory Permissions Error:</h3>
 			<div class='container'>
-				<p>Shimmie needs to make three folders in it's directory, '<i>images</i>', '<i>thumbs</i>', and '<i>data</i>', and they need to be writable by the PHP user.</p>
-				<p>If you see this error, if probably means the folders are owned by you, and they need to be writable by the web server.</p>
+				<p>Shimmie needs to have a 'data' folder in its directory, writable by the PHP user.</p>
+				<p>If you see this error, if probably means the folder is owned by you, and it needs to be writable by the web server.</p>
 				<p>PHP reports that it is currently running as user: ".$_ENV["USER"]." (". $_SERVER["USER"] .")</p>
-				<p>Once you have created these folders and / or changed the ownership of the shimmie folder, hit 'refresh' to continue.</p>
+				<p>Once you have created this folder and / or changed the ownership of the shimmie folder, hit 'refresh' to continue.</p>
 				<br/><br/>
 			</div>
 		</div>
diff --git a/core/sys_config.php b/core/sys_config.php
index 6ae38347..891840db 100644
--- a/core/sys_config.php
+++ b/core/sys_config.php
@@ -40,7 +40,7 @@ _d("TIMEZONE", null);        // string   timezone
 _d("CORE_EXTS", "bbcode,user,mail,upload,image,view,handle_pixel,ext_manager,setup,upgrade,handle_404,comment,tag_list,index,tag_edit,alias_editor"); // extensions to always enable
 _d("EXTRA_EXTS", "");        // string   optional extra extensions
 _d("BASE_URL", null);        // string   force a specific base URL (default is auto-detect)
-_d("MIN_PHP_VERSION", '7.1');// string   minimum supported PHP version
+_d("MIN_PHP_VERSION", '7.0');// string   minimum supported PHP version
 _d("ENABLED_MODS", "imageboard");
 
 /*
diff --git a/core/util.php b/core/util.php
index d611aa88..cd06b8d9 100644
--- a/core/util.php
+++ b/core/util.php
@@ -182,10 +182,10 @@ function warehouse_path(string $base, string $hash, bool $create=true): string {
 	$ab = substr($hash, 0, 2);
 	$cd = substr($hash, 2, 2);
 	if(WH_SPLITS == 2) {
-		$pa = $base.'/'.$ab.'/'.$cd.'/'.$hash;
+		$pa = 'data/'.$base.'/'.$ab.'/'.$cd.'/'.$hash;
 	}
 	else {
-		$pa = $base.'/'.$ab.'/'.$hash;
+		$pa = 'data/'.$base.'/'.$ab.'/'.$hash;
 	}
 	if($create && !file_exists(dirname($pa))) mkdir(dirname($pa), 0755, true);
 	return $pa;
diff --git a/index.php b/index.php
index b944e3eb..4aedff09 100644
--- a/index.php
+++ b/index.php
@@ -48,6 +48,10 @@ if(!file_exists("data/config/shimmie.conf.php")) {
 	exit;
 }
 
+if(file_exists("images") && !file_exists("data/images")) {
+	die("As of Shimmie 2.7 images and thumbs should be moved to data/images and data/thumbs");
+}
+
 if(!file_exists("vendor/")) {
 	//CHECK: Should we just point to install.php instead? Seems unsafe though.
 	print <<<EOD