change master to main in scripts and docs (#1569)

* change master to main in scripts and docs

Changes the naming from master to main in the scripts and documentation.

Do not merge unless CI passes!

Signed-off-by: Charlie Drage <charlie@charliedrage.com>

* remove 1.18, specify version of staticcheck

---------

Signed-off-by: Charlie Drage <charlie@charliedrage.com>

script/test_in_container/Dockerfile

@@ -36,8 +36,6 @@ ENV PATH="$PATH:$GOPATH/bin:$GOROOT/bin" \
 WORKDIR /tmp/go
 RUN curl https://storage.googleapis.com/golang/go$GOVERSION.linux-amd64.tar.gz | tar -xz -C /usr/local
 
-RUN go get honnef.co/go/tools/cmd/staticcheck@latest
-
 WORKDIR $KOMPOSE_SRC
 # This image can be run as any user
 RUN chmod -R ugo+rw $GOPATH