Dockerised the app

Good use of env vars now

Signed-off-by: Gunwant Jain <mail@wantguns.dev>

docker-compose.yml

@@ -0,0 +1,15 @@
+version: '3.3'
+services:
+  pastebin:
+    build:
+      context: .
+    restart: always
+    container_name: pastebin
+    ports:
+      - 127.0.0.1:6162:6162
+    environment:
+      - ROCKET_PORT=6162
+      - THEME=gruvbox-dark  # By default, it uses the Ayu Colorscheme
+      - HOST=localhost:6162 # or bin.example.com 
+    volumes:
+      - ./upload:/app/upload  # upload folder will have your pastes