add docker stuff

Dockerfile

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+FROM golang:1.20-alpine
+
+RUN apk add --no-cache git
+WORKDIR /app
+
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+RUN go build -o main .
+
+EXPOSE 48723
+
+CMD ["./main"]

compose.yml

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+services:
+  web:
+    build: .
+    ports:
+      - "48723:48723"
+    volumes:
+      - /mnt/storage/files:/app/files
+    restart: unless-stopped