Add goatcounter page

pages/02.linux/goatcounter/default.en.md

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+---
+title: GoatCounter
+visible: true
+---
+
+[toc]
+
+GoatCounter is an Open Source Analytics written in Go.
+
+## Installation
+
+GoatCounter is distributed as a statically compiled binary.  
+Releases can be found on [GitHub](https://github.com/arp242/goatcounter/releases)
+
+As GoatCounter is a separate binary, I'm using the path `/usr/local/bin` with a new folder called `goatcounter` as the destination.  
+The binary file will be moved after downloading, in order to avoid modifying the systemd service after every update.
+
+```sh
+mkdir /usr/local/bin/goatcounter
+cd /usr/local/bin/goatcounter
+wget https://github.com/arp242/goatcounter/releases/download/v2.4.1/goatcounter-v2.4.1-linux-amd64.gz
+gzip -d goatcounter-v2.4.1-linux-amd64.gz
+mv goatcounter-v2.4.1-linux-amd64 goatcounter
+```
+
+The extracted binary needs to be marked as executable.
+
+```sh
+chmod +x goatcounter
+```
+
+GoatCounter needs write permissions for the directory it is located in to create its SQLite database on startup.  
+As I will be using a reverse proxy in front of it, I need to add the following two parameters when executing GoatCounter.
+
+```
+-listen :8888: Set listening Port to 8888 for use with a reverse proxy
+-tls http: By default GoatCounter tries to generate a certificate using ACME. This option forces unencrypted HTTP
+```
+
+Run GoatCounter once to generate the necessary database files.
+
+```sh
+./goatcounter serve -listen :8888 -tls http
+```
+
+### Create site
+
+To use GoatCounter, a new site needs to be defined.  
+You will be prompted for the user password.
+
+```
+-vhost: Domain used for GoatCounter
+-user.email: Login email address
+```
+
+```sh
+./goatcounter db create site -vhost {URL} -user.email {EMAIL}
+```
+
+### Systemd Service
+
+Create a service file at `/etc/systemd/system/goatcounter.service`  
+The `WorkingDirectory` option can be changed to control where you want to create the SQLite database file.  
+Do note, that you will have to specify the database location using `-db 'sqlite+{PATH TO DB}.sqlite3` when running the binary directly.
+
+```systemd
+[Unit]
+Description=GoatCounter Service
+After=network.target
+
+[Service]
+Type=simple
+WorkingDirectory=/usr/local/bin/goatcounter
+ExecStart=/usr/local/bin/goatcounter/goatcounter serve -listen :8888 -tls http
+
+[Install]
+WantedBy=multi-user.target
+```
+
+```sh
+systemctl daemon-reload
+systemctl enable --now goatcounter
+```
+
+### Nginx config
+
+```nginx
+server {
+    server_name goat.exu.li;
+
+    # Security / XSS Mitigation Headers
+    add_header X-Frame-Options "SAMEORIGIN";
+    add_header X-XSS-Protection "1; mode=block";
+    add_header X-Content-Type-Options "nosniff";
+    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains";
+
+    location / {
+        # Proxy main traffic
+        proxy_pass http://172.18.50.105:8888;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header X-Forwarded-Protocol $scheme;
+        proxy_set_header X-Forwarded-Host $http_host;
+    }
+
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+    ssl_certificate_key /etc/acme-sh/goat.exu.li/key.pem;
+    ssl_certificate /etc/acme-sh/goat.exu.li/cert.pem;
+}
+
+server {
+    if ($host = goat.exu.li) {
+        return 301 https://$host$request_uri;
+    }
+
+    listen 80;
+    listen [::]:80;
+    server_name goat.exu.li;
+    return 404;
+}
+```