add nix flake to generate website with pelican

.github/workflows/build.yml

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+name: Build and Deploy
+
+on:
+  push:
+    branches:
+      - main  # Adjust this as needed
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Nix
+        uses: cachix/install-nix-action@v16
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+
+      - name: Build site
+        run: nix build .#defaultPackage.${{ matrix.system }} --print-build-logs
+
+      - name: Deploy to GitHub Pages
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./output

content/posts/post1.md

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+Title: My First Post
+Date: 2023-01-01
+Category: Test
+
+This is the content of my first post.

content/posts/post2.md

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+Title: My Second Post
+Date: 2023-01-02
+Category: Test
+
+This is the content of my second post.

flake.nix

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+{
+  description = "A flake to build a Pelican static site";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }: flake-utils.lib.eachDefaultSystem (system:
+    let
+      pkgs = import nixpkgs { inherit system; };
+    in {
+      devShell = pkgs.mkShell {
+        buildInputs = [
+          pkgs.python310
+          pkgs.python310Packages.pelican
+          pkgs.python310Packages.markdown
+        ];
+      };
+
+      defaultPackage = pkgs.writeShellScriptBin "build-site" ''
+        export PATH=$PATH:${pkgs.python310Packages.pelican}/bin
+        pelican content -o output -s pelicanconf.py
+      '';
+    });
+}

pelicanconf.py

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+AUTHOR = 'Sergei Volkov'
+SITENAME = 'My Pelican Site'
+SITEURL = ''
+
+PATH = 'content'
+
+TIMEZONE = 'Europe/Berlin'
+
+DEFAULT_LANG = 'en'
+
+# Feed generation is usually not desired when developing
+FEED_ALL_ATOM = None
+CATEGORY_FEED_ATOM = None
+TRANSLATION_FEED_ATOM = None
+AUTHOR_FEED_ATOM = None
+AUTHOR_FEED_RSS = None
+
+# Blogroll
+LINKS = (('Pelican', 'https://getpelican.com/'),)
+
+# Social widget
+#SOCIAL = (('You can add links in your config file', '#'),)
+
+DEFAULT_PAGINATION = 10
+
+# Uncomment following line if you want document-relative URLs when developing
+#RELATIVE_URLS = True

publishconf.py

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+import os
+import pelicanconf
+
+#SITEURL = 'https://taranarmo.github.io/'
+RELATIVE_URLS = False
+
+FEED_ALL_ATOM = 'feeds/all.atom.xml'
+CATEGORY_FEED_ATOM = 'feeds/{slug}.atom.xml'
+
+DELETE_OUTPUT_DIRECTORY = True
+
+# Following items are often useful when publishing
+
+#DISQUS_SITENAME = ""
+#GOOGLE_ANALYTICS = ""