Add Docker Compose setup for self-hosted Shlink on Coolify

docker-compose.yml

@@ -0,0 +1,38 @@
+services:
+  shlink:
+    image: shlinkio/shlink:stable
+    restart: unless-stopped
+    environment:
+      DEFAULT_DOMAIN: ${DEFAULT_DOMAIN}
+      IS_HTTPS_ENABLED: ${IS_HTTPS_ENABLED:-true}
+      DB_DRIVER: postgres
+      DB_HOST: db
+      DB_PORT: 5432
+      DB_NAME: ${DB_NAME:-shlink}
+      DB_USER: ${DB_USER:-shlink}
+      DB_PASSWORD: ${DB_PASSWORD}
+      INITIAL_API_KEY: ${INITIAL_API_KEY}
+      TIMEZONE: ${TIMEZONE:-UTC}
+    depends_on:
+      db:
+        condition: service_healthy
+    ports:
+      - "8080:8080"
+
+  db:
+    image: postgres:16-alpine
+    restart: unless-stopped
+    environment:
+      POSTGRES_DB: ${DB_NAME:-shlink}
+      POSTGRES_USER: ${DB_USER:-shlink}
+      POSTGRES_PASSWORD: ${DB_PASSWORD}
+    volumes:
+      - db_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${DB_USER:-shlink} -d ${DB_NAME:-shlink}"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
+
+volumes:
+  db_data: