Sitecore 10.3 Containers Installation Guide

Step 1: Download   Container Deployment Package from https://dev.sitecore.net/Downloads/Sitecore_Experience_Platform/103/Sitecore_Experience_Platform_103.aspx

Step 2: Create a folder C:\sitecore and put the downloaded file inside it the full path will be C:\sitecore\SitecoreContainerDeployment.10.3.0.008463.1135.zip

Step 3: Extract the file SitecoreContainerDeployment.10.3.0.008463.1135.zip to the same folder 

Step 4: Open PowerShell as administrator and run

Step 5: make sure to put your license under path C:\License\license.xml, we set host name to be Test (TestCM_XP1,TestCD_XP1,TestID_XP1) and keep the passwords as default

Step 6: run 

Error 1: if the below error appear 

Solution 1 :
Open the compose-init.ps1 file under C:\sitecore\SitecoreContainerDeployment.10.3.0.008463.1135\compose\ltsc2019\xp1.
Find the following code:

Replace it with the proposed solution:
 

Step 7: Update 

• C:\sitecore\SitecoreContainerDeployment.10.3.0.008463.1135\compose\ltsc2019\xp1\env
  SQL_CUSTOM_DATABASE_PREFIX_UPDATE_FROM=Custom

Step 8: run docker-compose.exe up --detach

Error 2: if the below error appear 

Solution 2 :

• Stop IIS 
• run netstat -aon | findstr 443

Check the port assign to 443 in the below it will be port 9028

• Set your port and run taskkill /PID [YourPort] /F

Step 9: run docker-compose.exe up --detach again


Now try to browse your CM and  your Site will be up running 

https://testcm_xp1/sitecore/

Use Admin/Password12345 to login 

Hope this will be helpful