fix markdown warnings

README.md

@@ -1,5 +1,7 @@
 # IFM - improved file manager
+
 ## contents
+
  - [about](#about)
  - [features](#features)
  - [requirements](#requirements)
@@ -12,6 +14,7 @@
  - [issues](#issues)
 
 ## About
+
 The IFM is a web-based filemanager, which comes as a single file solution using
 HTML5, CSS3, JavaScript and PHP. You can test a [demo
 here](https://ifmdemo.gitea.de/).
@@ -26,6 +29,7 @@ The IFM uses the following resources:
 * [Mustache](https://mustache.github.io/)
 
 ## features
+
 * create/edit files and directories
 * copy/move files and directories
 * download files and directories
@@ -36,6 +40,7 @@ The IFM uses the following resources:
 * simple authentication (LDAP via `ldap_bind` possible)
 
 ## Requirements
+
 * Client
   * HTML5 and CSS3 compatible browser
   * activated javascript
@@ -55,6 +60,7 @@ The IFM uses the following resources:
     * zlib
 
 ## Installation
+
 Just download the latest release of the IFM. You can find it
 [here](https://github.com/misterunknown/ifm/releases/latest). You can choose
 between the CDN version (dependencies like bootstrap, jquery etc. are loaded
@@ -65,6 +71,7 @@ recommended; if the filesize of the IFM is an issue for you, consider using the
 CDN versions.
 
 ## Security information
+
 The IFM is usually locked to it's own directory, so you are not able to go
 above. You can change that by setting the `root_dir` in the scripts
 [configuration](https://github.com/misterunknown/ifm/wiki/Configuration).
@@ -76,6 +83,7 @@ configuration. [See
 also](https://github.com/misterunknown/ifm/wiki/Configuration).
 
 ## Key bindings
+
 * <kbd>e</kbd> - edit / extract current file
 * <kbd>h</kbd><kbd>j</kbd><kbd>k</kbd><kbd>l</kbd> - vim-style navigation (alternative to arrow keys)
 * <kbd>g</kbd> - focus the path input field (i.e. "goto")
@@ -95,41 +103,57 @@ also](https://github.com/misterunknown/ifm/wiki/Configuration).
 * <kbd>Ctrl</kbd>-<kbd>Shift</kbd>-<kbd>f</kbd> - toggle fullscreen ace editor
 
 ## Configuration
+
 See [configuration](https://github.com/misterunknown/ifm/wiki/Configuration).
+
 ### authentication
+
 See [authentication](https://github.com/misterunknown/ifm/wiki/Authentication).
 
 ## Docker
+
 The docker image is based on the official php docker images (alpine version)
 and exposes port 80.
 
 ### Quickstart
+
 Build the image with this command in the top source dir:
 
-`docker build -t ifm .`
+```bash
+docker build -t ifm .
+```
 
 Afterwards you can start the docker container as follows:
 
-`docker run --rm -d --name ifm -p 8080:80 -v /path/to/data:/var/www ifm:latest`
+```bash
+docker run --rm -d --name ifm -p 8080:80 -v /path/to/data:/var/www ifm:latest
+```
 
 ### Specify user/group
+
 By default IFM runs as user www-data (uid/gid 33). If you need to change that,
 you can set the UID and GID with the following environment variables:
 
-`docker run ... -e IFM_DOCKER_UID=1000 -e IFM_DOCKER_GID=100 ifm:latest`
+```bash
+docker run ... -e IFM_DOCKER_UID=1000 -e IFM_DOCKER_GID=100 ifm:latest
+```
 
 ### Other configuration
+
 The script is located at `/usr/local/share/webapps/ifm/index.php`. By default
 the `root_dir` is set to /var/www, so you can mount any directory at this
 location. If you want to bind the corresponding host directory, you can do the
 following:
 
-`docker run --rm -i -p "8080:80" -v "/var/www:/var/www" ifm`
+```bash
+docker run --rm -i -p "8080:80" -v "/var/www:/var/www" ifm
+```
 
 The scripts configuration can be changed by adjusting the corresponding
 environment variables. For example:
 
-```docker run --rm -i -p "8080:80" -v /var/www:/var/www \
+```bash
+docker run --rm -i -p "8080:80" -v /var/www:/var/www \
   -e IFM_AUTH=1 -e IFM_AUTH \
   -e IFM_AUTH_SOURCE="admin:$2y$05$LPdE7u/5da/TCE8ZhqQ1o.acuV50HqB3OrHhNwxbXYeWmmZKdQxrC" \
   ifm
@@ -139,11 +163,13 @@ You can get a complete list of environment variables
 [here](https://github.com/misterunknown/ifm/wiki/Configuration#configuration-options).
 
 ## screenshots
+
 <a href="https://misterunknown.de/static/ifm_screenshot_desktop_filelist.png"><img src="https://misterunknown.de/static/ifm_screenshot_desktop_filelist.png" height="300px"></a>
 <a href="https://misterunknown.de/static/ifm_screenshot_mobile_filelist.png"><img src="https://misterunknown.de/static/ifm_screenshot_mobile_filelist.png" height="300px"></a>
 <a href="https://misterunknown.de/static/ifm_screenshot_desktop_remote_upload.png"><img src="https://misterunknown.de/static/ifm_screenshot_desktop_remote_upload.png" height="300px"></a>
 <a href="https://misterunknown.de/static/ifm_screenshot_mobile_editfile.png"><img src="https://misterunknown.de/static/ifm_screenshot_mobile_editfile.png" height="300px"></a>
 
 ## issues
+
 If you happen to find an error or miss a feature, you can create an issue on
 Github.