Add Getting Started page (#30)

Fixes #25

content/pages/getting-started.md

@@ -0,0 +1,72 @@
+Title: Getting Started
+Slug: getting-started
+Summary: Getting started implementing the SpaceAPI for your hackerspace.
+SortOrder: 20
+
+If you want to implement the SpaceAPI for your hackerspace you need to do the
+following:
+
+ - [ ] Host the JSON file and a logo somewhere
+ - [ ] Create a
+   [pull-request](https://help.github.com/en/articles/creating-a-pull-request)
+   for the [directory repository](https://github.com/spaceapi/directory) to add
+   your space to the directory.
+
+# Hosting
+
+The most minimal solution is to just [statically
+host](https://en.wikipedia.org/wiki/Static_web_page) the JSON file on your own
+server.
+
+A most minimal JSON file with just the required fields looks like that:
+
+    :::json
+    {
+      "api": "0.13",
+      "space": "$foospace",
+      "logo": "https://foospace.example.com/logo.png",
+      "url": "https://foospace.example.com",
+      "location": {
+        "lon": 1.337,
+        "lat": 42.001
+      },
+      "state": {
+        "open": null
+      },
+      "contact": {
+        "email": "info@foospace.example.com",
+      },
+      "issue_report_channels": [
+        "email"
+      ]
+    }
+
+## Common Issues
+
+To make sure That your SpaceAPI endpoint is compatible with webapps, verify
+that your server:
+
+ * Is reachable by TLS/HTTPS. See [Mixed
+   content](https://developer.mozilla.org/en-US/docs/Web/Security/Mixed_content)
+ * Sets the `Access-Control-Allow-Origin` header to `*`. See
+   [CORS](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS)
+
+
+## Dynamic Hosting
+
+If you want to support dynamic data in your API like sensor values, you need a
+way to update the JSON data. While you could just change the values in your
+statically hosted file, this may be impractical especially if you have values
+that change a lot.
+
+There are different implementation of servers which serve the SpaceAPI and
+provide an API to update sensor values. See the [SpaceAPI
+Community](https://github.com/spaceapi-community/) repositories or the [Apps
+page](./apps.html) for some examples.
+
+
+# Validation
+
+You can use the [SpaceAPI validator](https://spaceapi.io/pages/validator.html)
+to verify that you implement it correctly. It doesn't catch all issues and only
+works if your endpoint has