Daniel is right, support.atlassian.com is definetly the right portal for this sort of issue. This is a fairly common error for newbies or those unfamiliar with Atlassian products. I see it right in your error log, plus it's fairly blunt since we can't even start up.
See this Knowledgebase article: Confluence does not start due to Spring Application context has not been set
Let's break it down:
/opt/atlassian/confluence/) and read/write permissions to the
Again, the important directories and files:
Install Directory: /opt/atlassian/confluence/ Path to Home directory: <install>/confluence/WEB-INF/classes/confluence-init.properties Home Directory: /var/atlassian/application-data/confluence
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