use github-style markdown image sizing

cert_instructions/ios_cert.md

@@ -4,24 +4,31 @@
  * Using your iOS device, log in to your Bubble and tap "Devices"
  * You should now see a list of your devices. Find your iOS device and tap the "iOS" link to download the certificate.
  * After tapping on the "iOS" link you should see a popup asking you to confirm, as in the screenshot below
-<img src="ios_screenshots/01_download_profile.png" alt="screenshot of download profile popup" height="500"/>
+ <img src="ios_screenshots/01_download_profile.png" alt="screenshot of download profile popup" height="500"/>
  
  * Tap "Allow" to download the profile
  * You should now see a pop-up titled "Profile Downloaded" as in the screenshot below. Tap the Close button on this pop-up.
- ![screenshot of profile downloaded message](ios_screenshots/02_profile_downloaded.png)
+ <img src="ios_screenshots/02_profile_downloaded.png" alt="screenshot of profile downloaded message" height="500"/>
+ 
  * Open the "Settings" app on your phone. You should see a "Profile Downloaded" section near the top of your Settings screen, see screenshot below for an example. Tap "Profile Downloaded"
- ![screenshot of settings screen with profile](ios_screenshots/03_profile_in_settings.png)
+ <img src="ios_screenshots/03_profile_in_settings.png" alt="screenshot of settings screen with profile" height="500"/>
+ 
  * You should now see a profile screen that matches the name of your Bubble, like the screenshot below. In the top-right corner of the screen, tap "Install"
- ![screenshot of profile before installation](ios_screenshots/04_install_profile.png)
+ <img src="ios_screenshots/04_install_profile.png" alt="screenshot of profile before installation" height="500"/>
+ 
  * You'll see a "Warning" screen with a message about the certificate. In the top-right corner of the screen, tap "Install". An "Install" button will now appear at the bottom of your screen - tap this "Install" button to finish installing the certificate.
  * You'll now be back on the certificate screen and it should show a green "Verified" message, like in the screenshot blow. In the top-right corner of the screen, tap "Done"
- ![screenshot of profile after installation](ios_screenshots/05_profile_installed.png)
+ <img src="ios_screenshots/05_profile_installed.png" alt="screenshot of profile after installation" height="500"/>
+
  * Tap the "Back" button in the top-left corner of the screen to access General Settings. If you've closed your Settings app, re-open Settings and scroll down to "General", tap "General"
  * At the top of the General Settings screen (screenshot below), tap "About"
- ![screenshot of 'General' settings](ios_screenshots/06_general_settings.png)
+  <img src="ios_screenshots/06_general_settings.png" alt="screenshot of 'General' settings" height="500"/>
+ 
  * Scroll all the way to the bottom of the "About" screen and tap "Certificate Trust Settings", see screenshot below
- ![screenshot of 'About' settings](ios_screenshots/07_about_settings.png)
+  <img src="ios_screenshots/07_about_settings.png" alt="screenshot of 'About' settings" height="500"/>
+ 
  * You should now see the certificate you just installed. Tap the toggle switch to enable it.
  * When you tap the toggle switch, you'll see a warning like the screenshot below. You'll see the message "Warning: enabling this certificate for websites will allow third parties to view any private data sent to websites." This is OK, there is no third party here -- your Bubble is only yours. Tap "Continue"
- ![screenshot of 'Certificate Trust' settings](ios_screenshots/08_trust_settings.png)
+  <img src="ios_screenshots/08_trust_settings.png" alt="screenshot of 'Certificate Trust' settings" height="500"/>
+ 
  * Congratulations! You have successfully installed your Bubble certificate!