fix(docker): image now builds

adding non root user execution capabilities

misc/docker/Dockerfile

@@ -1,11 +1,11 @@
-FROM golang:1.19 AS build
+FROM reg.cadoles.com/dh/library/golang:1.17 AS build
 
 ARG HTTP_PROXY=
 ARG HTTPS_PROXY=
 ARG http_proxy=
 ARG https_proxy=
 
-RUN apt-get update && apt-get install -y build-essential git bash curl
+RUN apt-get update && apt-get install -y build-essential git bash curl npm python2
 
 RUN curl -sL https://deb.nodesource.com/setup_14.x | bash - \
     && apt-get install -y nodejs
@@ -20,12 +20,13 @@ RUN cp -f misc/docker/config-patch.txt misc/release/config-patch.txt \
 
 FROM busybox
 
+RUN adduser -D -h /app fsmtp
+
 COPY --from=build /src/release/fake-smtp-linux-amd64 /app
-
+RUN chown -R fsmtp:fsmtp /app
-WORKDIR /app
-
-RUN mkdir -p /app
 
 EXPOSE 8080 2525
+USER fsmtp
+WORKDIR /app
 
 CMD ["bin/fake-smtp", "--config", "config.yml"]