Add docker and compose

.env.example

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+# vi: ft=sh
+# shellcheck disable=SC2034
+
+# Database things
+POSTGRES_USER=vex
+POSTGRES_PASSWORD=pass
+POSTGRES_DB=vex_db
+POSTGRES_SERVER=postgres
+POSTGRES_PORT=5432

.gitignore

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+.env

api/Dockerfile

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+FROM golang:1.22-alpine
+WORKDIR /app
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+RUN go build -o ./vex
+
+EXPOSE 1597
+CMD ./vex

api/Dockerfile.dev

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+FROM golang:1.22-alpine
+RUN go install github.com/bokwoon95/wgo@latest
+WORKDIR /app
+
+EXPOSE 1597
+CMD wgo run .

docker-compose.dev.yml

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+services:
+  api:
+    build:
+      context: ./api
+      dockerfile: Dockerfile.dev
+    restart: on-failure
+    volumes:
+      - ./api:/app
+    env_file:
+      - ./.env
+    depends_on:
+      postgres:
+        condition: service_healthy
+
+  postgres:
+    image: postgres:15
+    restart: on-failure
+    env_file:
+      - ./.env
+    volumes:
+      - db:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER} -d ${POSTGRES_DB}"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+
+volumes:
+  db:

docker-compose.yml

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+services:
+  api:
+    build: ./api
+    restart: on-failure
+    env_file:
+      - ./.env
+    depends_on:
+      postgres:
+        condition: service_healthy
+
+  postgres:
+    image: postgres:15
+    restart: on-failure
+    env_file:
+      - ./.env
+    volumes:
+      - db:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER} -d ${POSTGRES_DB}"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+
+volumes:
+  db: