Add Docker image and compose with documentation

docker-compose.yml

@@ -0,0 +1,29 @@
+version: "3"
+
+services:
+  proxy:
+    image: nginx:alpine
+    container_name: twitfix_proxy
+    volumes:
+      - "./twitfix_proxy.conf:/etc/nginx/conf.d/default.conf"
+    ports:
+      - 8088:80
+    depends_on:
+      - twitfix
+
+  twitfix:
+    image: twitfix
+    build: .
+    container_name: twitfix_main
+    volumes:
+      - "./twitfix.ini:/twitfix/twitfix.ini:ro"
+      - "./config.json:/twitfix/config.json:ro"
+    depends_on:
+      - db
+
+  db:
+    image: mongo:5.0.9
+    container_name: twitfix_db
+    volumes:
+      - "./db:/data/db"
+