Add docker

Author: https://github.com/sedadas

server/.dockerignore

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+assets/

server/Dockerfile

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+FROM alpine:latest AS builder
+
+WORKDIR /usr/local/src
+COPY . .
+
+RUN apk add --no-cache \
+    protobuf \
+    protobuf-dev \
+    protoc \
+    make \
+    go \
+    libcap
+
+RUN go install google.golang.org/protobuf/cmd/protoc-gen-go@latest &&\
+    go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest &&\ 
+    PATH="$PATH:$(go env GOPATH)/bin" make proto &&\
+    go build -o lunar-tear ./cmd/lunar-tear &&\
+    setcap cap_net_bind_service=+ep ./lunar-tear
+
+FROM alpine:latest
+
+WORKDIR /opt/lunar-tear
+
+RUN chown 1000:1000 /opt/lunar-tear
+
+USER 1000
+
+COPY --from=builder /usr/local/src/lunar-tear .
+
+COPY entrypoint.sh .
+
+ENTRYPOINT /opt/lunar-tear/entrypoint.sh
+

server/docker-compose.yaml

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+services:
+  server:
+    build: .
+    image: kretts/lunar-tear:latest
+    environment:
+      LUNAR_HOST: 127.0.0.1
+      LUNAR_HTTP_PORT: 8080
+      LUNAR_SCENE: 0
+    volumes:
+      - ./assets:/opt/lunar-tear/assets
+    ports:
+      - 443:443 # grpc, hardcoded by the client, not configurable
+      - 8080:8080
+

server/entrypoint.sh

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+#!/usr/bin/env sh
+
+./lunar-tear --host "${LUNAR_HOST}" --http-port "${LUNAR_HTTP_PORT}" --scene "${LUNAR_SCENE}"
+