Add service config and selinux config

CONFIG.md

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+# Server config
+
+Might have to run `sudo chcon -t bin_t ~/blog/target/release/blog-server` to make the binary executable
+
+Update the port in main.rs to a free port
+

blog.service

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+[Unit]
+Description=Blog Server
+After=network.target
+
+[Service]
+RestartSec=2s
+Type=simple
+User=fedora
+Group=fedora
+WorkingDirectory=/home/fedora/blog/
+ExecStart=/home/fedora/blog/target/release/blog-server
+Restart=always
+
+[Install]
+WantedBy=multi-user.target