Sqlite (#2)

* Migrated ur an sqlite database

* Removed unnecessary IOExceptions

* Removed an util class not needed anymore

* Updated README.md and docker-compose.yml to reflect new storage mechanism

* This change was not meant for this branch

* Port change with environment variable

* Unused imports

* Updated README.md

* Added basic protection against duplication

README.md

@@ -19,6 +19,21 @@ unnecessary features, or they didn't have all the features I wanted.
   written in plain HTML and vanilla JS, using [Pure CSS](https://purecss.io/)
   for styling
   
+# Bloat that will not be implemented
+- Logging, tracking or spying of any kind. The only logs that still exist are
+ errors printed to stderr and the default SLF4J warning
+- User management. If you need a shortener for your whole organisation, either
+ run separate containers for everyone or use something else
+- Cookies, newsletters, "we value your privacy" popups or any of the multiple
+other ways modern web shows how anti-user it is. We all hate those and they're
+not needed here
+- Paywalls or messages beging for donations. If you want to support me (for
+whatever reason), you can message me through Github issues or via email
+[github@draganczuk.tk](mailto:github@draganczuk.tk)
+
+I _might_ add one of those "fork me on github" thingies in the corner, though I
+doubt I will
+
 # Screenshot
 ![Screenshot](./screenshot.png)
 
@@ -55,6 +70,8 @@ export db.url=<url> # Default: './urls.sqlite'
 ```
 java -jar build/libs/url.jar
 ```
+You can optionally set the port the server listens on by appending `--port=[port]`
+
 ### 4. Navigate to `http://localhost:4567` in your browser, add links as you wish.
 
 ## Running with docker

src/main/java/tk/draganczuk/url/App.java

@@ -1,7 +1,5 @@
 package tk.draganczuk.url;
 
-import spark.Filter;
-
 import static spark.Spark.*;
 
 public class App {
@@ -17,7 +15,7 @@ public class App {
 			staticFiles.location("/public");
 		}
 
-		port(Integer.parseInt(System.getProperty("port", "4567")));
+		port(Integer.parseInt(System.getenv().getOrDefault("port", "4567")));
 
 		// Add GZIP compression
 		after(Filters::addGZIP);

src/main/java/tk/draganczuk/url/Routes.java

@@ -4,8 +4,6 @@ import org.eclipse.jetty.http.HttpStatus;
 import spark.Request;
 import spark.Response;
 
-import java.io.IOException;
-
 public class Routes {
 
 	private static UrlRepository urlRepository;

src/main/java/tk/draganczuk/url/UrlRepository.java

@@ -1,10 +1,5 @@
 package tk.draganczuk.url;
 
-import java.io.File;
-import java.io.IOException;
-import java.nio.file.Files;
-import java.nio.file.StandardCopyOption;
-import java.nio.file.StandardOpenOption;
 import java.sql.*;
 import java.util.ArrayList;
 import java.util.List;