Added neovim container

vim/Dockerfile

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+FROM alpine:latest
+
+RUN apk update && apk add --no-cache neovim && \
+    mkdir -p /root/.config/nvim
+
+COPY init.vim /root/.config/nvim/init.vim

vim/README.md

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+# What is this?
+This is a very simple container which I use to edit configs inside a Docker
+volume. It allows me to keep a lot more data inside a volume, cleaning up the
+rest of the system.
+
+# Included script
+The included script just mounts the given directory in the `nvim:latest`
+volume. In order to use it, you should've built the container first.
+
+# Building the container
+You can build the container with the following command:
+
+```
+docker build -t chewingbever/nvim:latest .
+```
+
+This will build the image and tag it correctly, making it useable in the `de`
+script.

vim/de

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+#!/usr/bin/env bash
+docker run --rm -it -v "$1":/data -w '/data' chewingbever/nvim:latest

vim/init.vim

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+let g:mapleader = ' '
+
+set splitbelow splitright
+set expandtab tabstop=4 shiftwidth=4
+set incsearch smartcase nohlsearch
+set swapfile directory=~/.vim/swap//
+set undofile undodir=~/.vim/undo//
+
+nnoremap j jzz
+nnoremap k kzz
+nnoremap gg ggzz
+nnoremap G Gzz
+
+nnoremap <silent> <leader>h :wincmd h<CR>
+nnoremap <silent> <leader>j :wincmd j<CR>
+nnoremap <silent> <leader>k :wincmd k<CR>
+nnoremap <silent> <leader>l :wincmd l<CR>
+
+nnoremap <silent> <Up> :resize +3<CR>
+nnoremap <silent> <Down> :resize -3<CR>
+nnoremap <silent> <Right> :vertical resize +3<CR>
+nnoremap <silent> <Left> :vertical resize -3<CR>
+
+inoremap jk <Esc>
+inoremap <Esc> <nop>
+
+nnoremap <leader>a <C-^>
+
+tnoremap <silent> jk <C-\><C-n>
+
+nnoremap <silent> <leader>rr :terminal<CR>
+nnoremap <silent> <leader>rh :vsp<CR>:wincmd h<CR>:term<CR>
+nnoremap <silent> <leader>rl :vsp<CR>:term<CR>
+nnoremap <silent> <leader>rk :sp<CR>:wincmd k<CR>:term<CR>
+nnoremap <silent> <leader>rj :sp<CR>:term<CR>
+
+function! ToggleLineNumbers()
+        if &number
+                set nonumber
+                set norelativenumber
+        else
+                set number
+                set relativenumber
+        endif
+endfunction
+
+nnoremap <silent> <leader>L :call ToggleLineNumbers()<CR>