Add filter, add READMES

backend_go/Dockerfile

@@ -0,0 +1,23 @@
+FROM golang:1.22-alpine AS builder
+
+WORKDIR /src
+
+COPY go.mod /src/go.mod
+
+RUN go mod download
+
+COPY . /src
+
+RUN CGO_ENABLED=0 GOOS=linux go build -trimpath -ldflags="-s -w" -o /out/backend ./
+
+FROM alpine:3.20
+
+RUN apk add --no-cache ca-certificates curl
+
+WORKDIR /app
+
+COPY --from=builder /out/backend /app/backend
+
+EXPOSE 8000
+
+CMD ["/app/backend"]