Merge pull request #1458 from lahwaacz/readme

Small README improvements

README.md

@@ -287,7 +287,7 @@ Options:
   -o, --overwrite-files
           Enable overriding existing files during file upload
 
-          [env: OVERWRITE_FILES=]
+          [env: MINISERVE_OVERWRITE_FILES=]
 
   -r, --enable-tar
           Enable uncompressed tar archive generation
@@ -473,10 +473,19 @@ In case you want to customize the particular flags that miniserve launches with,
 and set the `[Service]` part in the resulting `override.conf` file. For instance:
 
     [Service]
+    ExecStart=
     ExecStart=/usr/bin/miniserve --enable-tar --enable-zip --no-symlinks --verbose -i ::1 -p 1234 --title hello --color-scheme monokai --color-scheme-dark monokai -- %I
 
-Make sure to leave the `%I` at the very end in place or the wrong path might be served. You
-might additionally have to override `IPAddressAllow` and `IPAddressDeny` if you plan on making
+Make sure to leave the `%I` at the very end in place or the wrong path might be served.
+Alternatively, you can configure the service via environment variables:
+
+    [Service]
+    Environment=MINISERVE_ENABLE_TAR=true
+    Environment=MINISERVE_ENABLE_ZIP=true
+    Environment="MINISERVE_TITLE=hello world"
+    ...
+
+You might additionally have to override `IPAddressAllow` and `IPAddressDeny` if you plan on making
 miniserve directly available on a public interface.
 
 ## Binding behavior