doc: clean readme typos

README.md

@@ -8,20 +8,19 @@ simple requirementless, authenticationless file upload server
 - to expose a local folder called `./files`:
 
 ```
-docker run --name sfu \
-  -d -p 80:80 \
+docker run --name sfu -d \
   -v $(pwd)/files:/opt/sfu/files \
   -e SFU_FILES_DIR=/opt/sfu/files \
   -e SFU_PORT=80 \
-  -p 8000:80
-  1885504a9/sfu
+  -p 8000:80 \
+  185504a9/sfu
 
 ```
 
 - ... modify accordingly
 ## dev version
 
-### using docker
+### docker
 
 1. take a look at [docker-compose](docker-compose.yml) and modify the envvars accordingly. the default values **should work** as long as you're ok with a `files/` folder being created and **your user UID and GID are 1000**. if for some reason you need other ids, please add them like this: