Enable PR previews on netlify

docusaurus.config.js

@@ -8,6 +8,11 @@ const editUrl = {
   editUrl: "https://github.com/conda-forge/conda-forge.github.io/tree/main/",
 };
 
+var copyright = `Copyright © ${new Date().getFullYear()} conda-forge · Built with Docusaurus`;
+if (process.env.NETLIFY) {
+  copyright += ` · Deployed on <a href="https://www.netlify.com/" target="_blank">Netlify</a>`;
+}
+
 /** @type {import('@docusaurus/types').Config} */
 const config = {
   title: "conda-forge | community-driven packaging for conda",
@@ -360,7 +365,7 @@ const config = {
             ],
           },
         ],
-        copyright: `Copyright © ${new Date().getFullYear()} conda-forge · Built with Docusaurus`,
+        copyright: copyright,
       },
       prism: {
         theme: lightCodeTheme,

netlify.toml

@@ -0,0 +1,20 @@
+[build]
+  # Directory (relative to root of your repo) that contains the deploy-ready
+  # HTML files and assets generated by the build. If a base directory has
+  # been specified, include it in the publish directory path.
+  publish = "build"
+
+  # Default build command.
+  command = """
+    curl -L -o miniforge.sh https://github.com/conda-forge/miniforge/releases/latest/download/Miniforge3-Linux-x86_64.sh &&
+    bash miniforge.sh -bfp ~/miniforge &&
+    rm -rf miniforge.sh &&
+    source ~/miniforge/etc/profile.d/conda.sh &&
+    conda env create -f .ci_scripts/environment.yml &&
+    conda activate conda-forge-docs &&
+    ./.ci_scripts/update_docs
+  """
+
+  # We only want to build PR previews.
+  # Exit code == 0 means that the build is ignored.
+  ignore = 'test "$PULL_REQUEST" == "false"'