Add CSB version support to version selector, app routing, and Dockerfile

CSB/19_Psalms/Chapter_131.md

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+Psalm 131A Childlike Spirit
+
+1. Lord, my heart is not proud;
+my eyes are not haughty.
+
+I do not get involved with things
+too great or too wondrous for me.
+
+2. Instead, I have calmed and quieted my soul
+like a weaned child with its mother;
+my soul is like a weaned child.
+
+3. Israel, put your hope in the Lord,
+both now and forever.
+
+
+
+