adding Dockerfile

Dockerfile

+FROM debian:stable
+
+ADD https://github.com/neovim/neovim/releases/download/nightly/nvim.appimage nvim.appimage
+
+ADD https://golang.org/dl/go1.16.5.linux-amd64.tar.gz go.tar.gz
+
+RUN tar -C /usr/local -xzf go.tar.gz
+
+RUN ln -s /usr/local/go/bin/go /usr/bin/go
+
+RUN chmod +x nvim.appimage
+
+RUN apt update
+
+RUN apt install git curl npm python3 php composer \
+    php-curl php-xml python3-pip -y
+
+RUN mkdir /root/.config
+
+RUN mkdir -p /root/.local/bin
+
+RUN git clone https://github.com/lalanikarim/nvim-config.git /root/.config/nvim
+
+RUN curl -fLo ~/.local/share/nvim/site/autoload/plug.vim --create-dirs \
+    https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
+
+RUN bash ~/.config/nvim/install-language-servers.sh
+
+ENV PATH="/root/.local/bin:/usr/local/go/bin:${PATH}"
+
+RUN GO111MODULE=on go get golang.org/x/tools/gopls@latest
+
+RUN /nvim.appimage --appimage-extract-and-run -u ~/.config/nvim/plugins.vim -c ":PlugInstall|:q|:q"
+