ci: fix hadolint errors

Dockerfile

@@ -1,15 +1,17 @@
 ARG ARCH
 ARG BASE_IMAGE
+# hadolint ignore=DL3007
 FROM ${ARCH}allaman/nvim-full:latest
 
-RUN mkdir -p .config/nvim \
-  && mkdir -p .local/share/nvim/mason/packages \
+RUN mkdir -p ~/config/nvim \
+  && mkdir -p ~/.local/share/nvim/mason/packages \
   ## Create empty user config file
-  && echo "return {}" > .nvim_config.lua \
+  && echo "return {}" > ~/.nvim_config.lua \
   ## Add mason tools dir to path
   && echo "PATH=$PATH:~/.local/share/nvim/mason/bin" >> ~/.bashrc
 
-COPY --chown=nvim:nvim . .config/nvim
+WORKDIR /home/nvim/.config/nvim
+COPY --chown=nvim:nvim . .
 # Install plugins and tools with Mason and go.nvim
 # HACK: Use of sleep is not cool but commands are not blocking (! is not working either)
 RUN nvim --headless "+Lazy! sync" +qa