Remove SSH access from Dockerfile

Author: psiemens

Dockerfile

@@ -5,10 +5,6 @@ FROM golang:1.16 AS build-app
 
 ARG VERSION
 
-# add the pubkey of github.com to knownhosts, so ssh-agent doesn't bark
-RUN mkdir -p /root/.ssh && ssh-keyscan -t rsa github.com >> /root/.ssh/known_hosts
-RUN git config --global 'url.ssh://git@github.com/.insteadof' https://github.com/
-
 # Build the app binary in /app
 RUN mkdir /app
 WORKDIR /app
@@ -17,9 +13,7 @@ COPY . .
 
 # Keep Go's build cache between builds.
 # https://github.com/golang/go/issues/27719#issuecomment-514747274
-# Also, allow ssh access
-RUN --mount=type=ssh \
-    --mount=type=cache,target=/go/pkg/mod \
+RUN --mount=type=cache,target=/go/pkg/mod \
     --mount=type=cache,target=/root/.cache/go-build \
     GO111MODULE=on GOOS=linux GOARCH=amd64 \
     go build \