feat: optimise docker build

Dockerfile

@@ -1,15 +1,27 @@
-FROM golang:1.21
+FROM golang:1.21 AS builder
 
-# Copy metaploy configuration
-COPY metaploy/heimdall.metaploy.conf /
-COPY metaploy/postinstall.sh /
+WORKDIR /src
+
+COPY go.mod go.sum ./
+
+RUN go mod download
+
+COPY mail.go main.go ./
+
+RUN CGO_ENABLED=1 GOOS=linux go build -o ./heimdall --tags "fts5" -a -ldflags '-linkmode external -extldflags "-static"' .
+
+FROM alpine:latest AS app
+
+ENV TZ="Asia/Kolkata"
+
+RUN apk --no-cache add ca-certificates tzdata nginx bash
 
-# Copy source files
 WORKDIR /
-COPY go.mod go.sum main.go mail.go /
 
-# Build go package
-RUN go build
+COPY metaploy/heimdall.metaploy.conf metaploy/postinstall.sh ./
+
+RUN chmod +x ./postinstall.sh
+
+COPY --from=builder /src/heimdall .
 
-# Run postinstall script and the binary
-CMD ["/postinstall.sh", "/heimdall"]
+CMD ["./postinstall.sh", "./heimdall"]

docker-compose.yml

@@ -4,12 +4,8 @@ services:
         container_name: heimdall
         build: .
         restart: always
-        environment:
-            - JWT_SECRET_KEY=${JWT_SECRET_KEY}
-            - OTP_VALIDITY_PERIOD=${OTP_VALIDITY_PERIOD}
-            - RESEND_OTP_COOLDOWN=${RESEND_OTP_COOLDOWN}
-            - JWT_EXPIRY_DAYS=${JWT_EXPIRY_DAYS}
-
+        env_file:
+            - .env
         networks:
             metaploy-network:
                 aliases: