fix(docker): fix Dockerfile

Dockerfile

@@ -1,11 +1,16 @@
+# Build stage
 FROM golang:latest AS builder
 WORKDIR /app
 COPY go.mod go.sum ./
 RUN go mod download
 COPY . .
-RUN go build -v -o svg-templater ./...
+RUN CGO_ENABLED=0 GOOS=linux go build -v -o svg-templater ./cmd/svg-templater
 
+# Final stage
 FROM alpine:latest
 WORKDIR /root/
+EXPOSE 3000
+VOLUME ["/var/lib/svg-templater"]
+RUN apk add inkscape fontconfig
 COPY --from=builder /app/svg-templater /usr/local/bin/svg-templater
 CMD ["svg-templater"]