Remove Dockerfile, add README

Dockerfile

@@ -1,22 +0,0 @@
-FROM nixos/nix as build
-
-WORKDIR /app
-COPY . .
-
-RUN mkdir -p /out && \
-    nix bundle \
-        -o nvim.AppImage \
-        --bundler github:ralismark/nix-appimage \
-        --extra-experimental-features nix-command \
-        --extra-experimental-features flakes .#full && \
-        mv $(realpath nvim.AppImage) /out/neovim-x86_64-linux.AppImage && \
-    nix bundle \
-        -o nvim-minimal.AppImage \
-        --bundler github:ralismark/nix-appimage \
-        --extra-experimental-features nix-command \
-        --extra-experimental-features flakes .#minimal && \
-        mv $(realpath nvim-minimal.AppImage) /out/neovim-x86_64-linux-minimal.AppImage
-
-FROM busybox
-WORKDIR /out
-COPY --from=build /out /out

README.md

@@ -0,0 +1,16 @@
+## nvim.nix - personal Neovim config that runs on nixOS but doesn't sacrifice portability
+
+## Usage
+```bash
+nix run "github:iofq/nvim.nix" #full
+```
+
+Or, grab an AppImage from the Releases page.
+
+## What the hell?
+
+This is a flake to build a Neovim package that includes my custom Lua config and dependencies. It then is bundled via CI into an AppImage.
+
+## Why the hell though?
+
+I use these AppImages because I develop in a number of airgapped environments that make traditional dotfile management a nightmare. Downloading a single AppImage and copying it around is a more suckless way of managing this.