apache config files hinzugefügt, Readme angepasst

apache_site_signal.example.tld.proxy.conf

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+<VirtualHost *:80>
+    ServerName signal.example.tld
+    Redirect permanent / https://signal.example.tld/
+</VirtualHost>
+
+<VirtualHost *:443>
+    ServerName signal.example.tld
+
+    SSLEngine on
+    SSLCertificateFile /etc/letsencrypt/live/example.tld/fullchain.pem
+    SSLCertificateKeyFile /etc/letsencrypt/live/example.tld/privkey.pem
+    Include /etc/letsencrypt/options-ssl-apache.conf
+    # Optional, wenn vorhanden:
+
+    # Protocols h2 http/1.1
+
+
+    # Logs
+    ErrorLog ${APACHE_LOG_DIR}/signal_error.log
+
+    CustomLog ${APACHE_LOG_DIR}/signal_access.log combined
+
+    # Security Header
+    <IfModule mod_headers.c>
+        Header always set Strict-Transport-Security "max-age=31536000; includeSubDomains"
+    </IfModule>
+
+    # Proxy-Setup
+    ProxyPreserveHost On
+    ProxyRequests Off
+    ProxyAddHeaders On
+
+
+    # Leite alles an den Backend-Dienst weiter und erlaube WebSocket-Upgrades
+    ProxyPass        / http://127.0.0.1:8181/ upgrade=websocket keepalive=On
+    ProxyPassReverse / http://127.0.0.1:8181/
+
+
+    # Weitergereichte Header
+    RequestHeader set X-Forwarded-Proto expr=%{REQUEST_SCHEME}
+    RequestHeader set X-Real-IP        expr=%{REMOTE_ADDR}
+</VirtualHost>