docs: add basic readme

Signed-off-by: Adam Talbot <[email protected]>

Author: Adam Talbot

README.md

@@ -1 +1,31 @@
-# trust-manager-csi-driver
+# trust-manager-csi-driver
+
+> [!WARNING]  
+> This project in in POC stage and should not be used for anything you care about
+
+trust-manager-csi-driver is a CSI driver that can be used to mount bundles generated by [trust-manager](https://github.com/cert-manager/trust-manager) into a Pod. 
+
+It can generate volumes that conform to the `openssl rehash` layout produced by the `update-ca-certificates` command:
+
+```
+root@example:/# mount | grep /etc/ssl/certs
+tmpfs on /etc/ssl/certs type tmpfs (ro,relatime,inode64)
+root@example:/# ls /etc/ssl/certs/
+02265526.0  1636090b.0	40193066.0  5e98733a.0	773e07ad.0  b0e59380.0		 d4dae3dd.0  ef954a4e.0
+03179a64.0  18856ac4.0	4042bcee.0  5f15c80c.0	7aaf71c0.0  b1159c4c.0		 d6325660.0  f081611a.0
+062cdee6.0  1d3472b9.0	40547a79.0  5f618aec.0	7f3d5d1d.0  b66938e9.0		 d7e8dc79.0  f0c70a8d.0
+064e0aa9.0  1e08bfd1.0	406c9bb1.0  607986c7.0	8160b96c.0  b727005e.0		 d853d49e.0  f249de83.0
+06dc52d5.0  1e09d511.0	4304c5e5.0  626dceaf.0	8cb5ee0f.0  b7a5b843.0		 d887a5bb.0  f30dd6ad.0
+080911ac.0  244b5494.0	48bec511.0  653b494a.0	8d86cdd1.0  bf53fb88.0		 dc4d6a89.0  f3377b1b.0
+09789157.0  2923b3f9.0	4a6481c9.0  68dd7389.0	8d89cda1.0  c01cdfa2.0		 dd8e9d41.0  f387163d.0
+0a775a30.0  2ae6433e.0	4b718d9b.0  6b99d060.0	930ac5d2.0  c01eb047.0		 de6d66f3.0  f39fc864.0
+0b1b94ef.0  2b349938.0	4bfab552.0  6d41d539.0	93bc0acc.0  c28a8a30.0		 e113c810.0  f51bb24c.0
+0bf05006.0  2e5ac55d.0	4f316efb.0  6fa5da56.0	988a38cb.0  c47d9980.0		 e18bfb83.0  fc5a8f99.0
+0c4c9b6c.0  32888f65.0	5443e9e3.0  706f604c.0	9b5697b0.0  ca-certificates.crt  e36a6752.0  fe8a2cd8.0
+0f5dc4f3.0  349f2832.0	54657681.0  72909395.0	9c2e7d30.0  ca6e4ad9.0		 e69e0fc3.0  ff34af3f.0
+0f6fa695.0  3513523f.0	57bcb2da.0  749e9e03.0	9c8dfbd4.0  cbf06781.0		 e73d606e.0
+1001acf7.0  3bde41ac.0	5a4d6896.0  75d1b2ed.0	9d04f354.0  cc450945.0		 e868b802.0
+106f3e4d.0  3e44d2f7.0	5ad8a5d6.0  76cb8f92.0	a3418fda.0  cd58d51e.0		 e8de2f56.0
+116bf586.0  3e45d192.0	5cd81ad7.0  76faf6c0.0	a94d09e5.0  cd8c0d63.0		 ee64a828.0
+14bc7599.0  3fb36b73.0	5d3033c5.0  7719f463.0	aee5f10d.0  ce5e74ef.0		 eed8c118.0
+```