docker, drone ci

Dockerfile

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+# GO Repo base repo
+FROM golang:alpine3.14 as builder
+
+RUN apk add git
+
+# Add Maintainer Info
+LABEL maintainer="<Philipp Böhm>"
+
+RUN mkdir /app
+ADD . /app
+WORKDIR /app
+
+COPY go.mod go.sum ./
+
+# Download all the dependencies
+RUN go mod download
+
+COPY . .
+
+# Build the Go app
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .
+
+# GO Repo base repo
+FROM alpine:latest
+
+RUN apk --no-cache add ca-certificates curl
+
+RUN mkdir /app
+
+WORKDIR /app/
+
+# Copy the Pre-built binary file from the previous stage
+COPY --from=builder /app/main .
+
+# Expose port 8080
+EXPOSE 8080
+
+# Run Executable
+CMD ["./main"]